Has anyone tried double stacking a Lunt CaK filter to reduce the bandwidth to around 1.2A?
(Using an old PST yellow filter doesn’t count - only current Lunt filters)
Search found 3972 matches
- Wed Jan 26, 2022 10:22 pm
- Forum: Solar Scope Modifications
- Topic: Double Stack Lunt CaK filter
- Replies: 22
- Views: 5128
- Tue Jan 25, 2022 3:16 pm
- Forum: This is SolarChat !!
- Topic: CaK activity 25Jan 2022
- Replies: 11
- Views: 411
Re: CaK activity 25Jan 2022
Thanks to everyone, appreciate the feedback!
Going back to the 90mm f11 for the CaK gives better resolution (in my very average conditions) but the MiniSHG is much quicker for the run of the mill full disks and proms albeit at a smaller scale.
Going back to the 90mm f11 for the CaK gives better resolution (in my very average conditions) but the MiniSHG is much quicker for the run of the mill full disks and proms albeit at a smaller scale.
- Tue Jan 25, 2022 4:49 am
- Forum: This is SolarChat !!
- Topic: Feedback requested from Lunt/ Quark CaK/H users
- Replies: 26
- Views: 1297
Re: Feedback requested from Lunt/ Quark CaK/H users
Franco,
Thanks for that! Never seen a CaH prom before....
I assume this was a DayStar CaH Quark?
What acquisition software?
A little surprised to see gain=2121
Thanks for that! Never seen a CaH prom before....
I assume this was a DayStar CaH Quark?
What acquisition software?
A little surprised to see gain=2121
- Tue Jan 25, 2022 4:41 am
- Forum: This is SolarChat !!
- Topic: CaK activity 25Jan 2022
- Replies: 11
- Views: 411
CaK activity 25Jan 2022
Using the Vixen 90/1000 with the DIY CaK filter (1A bandwidth). Some issues with the internal tilt need to be addressed. Prom Images from stacks of 200 from 500 slightly sharpened. Exposures were typically 40-60ms, a total of 10sec. :shock: (For comparison the previous CaK I showed from the MiniSHG ...
- Mon Jan 24, 2022 6:25 pm
- Forum: This is SolarChat !!
- Topic: Sun in Ha and CaK Jan 20th 2022
- Replies: 16
- Views: 574
Re: Sun in Ha and CaK Jan 20th 2022
Ella,
A couple of comments on your CaK proms.
I'd try 16 bit SER setting for the ASI 178MM camera
FireCapture V2.7 (latest beta) I find is much better than V2.6
A couple of comments on your CaK proms.
I'd try 16 bit SER setting for the ASI 178MM camera
FireCapture V2.7 (latest beta) I find is much better than V2.6
- Mon Jan 24, 2022 3:47 am
- Forum: This is SolarChat !!
- Topic: Feedback requested from Lunt/ Quark CaK/H users
- Replies: 26
- Views: 1297
Re: Feedback requested from Lunt/ Quark CaK/H users
Bob, James, et al,
Very interesting discussions on non standard Lunt issues.
I’d like to keep the topic on track to provide some useful data to Lunt users who wish to record the CaK proms.
I thank everyone for their contribution so far.
I haven’t received any positive response from Quark users……
Very interesting discussions on non standard Lunt issues.
I’d like to keep the topic on track to provide some useful data to Lunt users who wish to record the CaK proms.
I thank everyone for their contribution so far.
I haven’t received any positive response from Quark users……
- Sun Jan 23, 2022 9:41 pm
- Forum: This is SolarChat !!
- Topic: Sol 19-1-22 Ha & Cak
- Replies: 11
- Views: 393
Re: Sol 19-1-22 Ha & Cak
Steve,
Thanks for the data.
I use Weiller's Corono, does a great job.
http://sweiller.free.fr/Softwares/Corono/corono.html
Thanks for the data.
I use Weiller's Corono, does a great job.
http://sweiller.free.fr/Softwares/Corono/corono.html
- Thu Jan 20, 2022 11:43 pm
- Forum: This is SolarChat !!
- Topic: Feedback requested from Lunt/ Quark CaK/H users
- Replies: 26
- Views: 1297
Re: Feedback requested from Lunt/ Quark CaK/H users
Stephen,
Very good mate!
Can you confirm the camera - Grasshopper seems to cover many - Express, IMX174, IMX252??
What typical settings - exposure , gain?
Did you stack images for the final ????
This would help others understand the challenge.
Thanks.
Very good mate!
Can you confirm the camera - Grasshopper seems to cover many - Express, IMX174, IMX252??
What typical settings - exposure , gain?
Did you stack images for the final ????
This would help others understand the challenge.
Thanks.
- Tue Jan 18, 2022 10:24 pm
- Forum: This is SolarChat !!
- Topic: Feedback requested from Lunt/ Quark CaK/H users
- Replies: 26
- Views: 1297
Feedback requested from Lunt/ Quark CaK/H users
I'm trying to determine the key factors in being able to image CaK proms with the Lunt CaK/ Quark CaH filter. I have received some data already but would like to extend the data as far as possible. If you've had success/ failure to image CaK proms please let me know. I'll share the outcome results. ...
- Sun Jan 16, 2022 7:58 am
- Forum: Solar Radio, Magnetometry and Spectroscopy
- Topic: Found the next challenge! CN wavelength
- Replies: 15
- Views: 1787
Re: Found the next challenge! CN wavelength
The professionals say the CN reflects the active magnetic regions and hence different from the other wavelengths.
- Sun Jan 16, 2022 4:53 am
- Forum: Solar Radio, Magnetometry and Spectroscopy
- Topic: Found the next challenge! CN wavelength
- Replies: 15
- Views: 1787
Re: Found the next challenge! CN wavelength
Managed to get a better image in Mg(b2) which allowed comparison with a Ca II K image and my latest challenge the CN molecular line "head" at 3883A. It looks like the Mg is very close to white light (photosphere) then the CN and finally the CaK in the lower chromosphere. Note the filaments...
- Sat Jan 15, 2022 4:39 am
- Forum: Solar Radio, Magnetometry and Spectroscopy
- Topic: Found the next challenge! CN wavelength
- Replies: 15
- Views: 1787
Found the next challenge! CN wavelength
While researching on magnetometers (June 1972 issue of Sky&Telescope) I found the "Babinet compensator" they used cost thousands $$$$$$. Andre Rondi has achieved creditable results with basic 1/4 wave plates on his SHG, which I'm sure cost MUCH less!! http://www.astrosurf.com/rondi/obs...
- Sat Jan 15, 2022 4:01 am
- Forum: This is SolarChat !!
- Topic: Sol 3-1-22 Ha & Cak
- Replies: 14
- Views: 572
Re: Sol 3-1-22 Ha & Cak
Steve, I appreciate you taking the time to answer my request. I already know that the relative resolutions between the Lunt CaK and the MiniSHG can impact on the recording of CaK proms. It looks like your total exposure was around 17.3ms x 100 = 1.73sec plus the sharpening etc. with a 120mm aperture...
- Sat Jan 15, 2022 3:26 am
- Forum: This is SolarChat !!
- Topic: Full disc 14-01-2022
- Replies: 11
- Views: 447
Re: Full disc 14-01-2022
Great record of the current activity well presented!
- Fri Jan 14, 2022 10:43 am
- Forum: This is SolarChat !!
- Topic: Solar activity 13th jan 2022 - Mg (b2)
- Replies: 9
- Views: 383
Re: Solar activity 13th jan 2022 - Mg (b2)
I'm not aware of any other Mg (b2) filters. Daystar seems to be the only one.
- Fri Jan 14, 2022 4:42 am
- Forum: This is SolarChat !!
- Topic: Sol 3-1-22 Ha & Cak
- Replies: 14
- Views: 572
Re: Sol 3-1-22 Ha & Cak
Steve,
PM sent.
Need your help.
PM sent.
Need your help.
- Fri Jan 14, 2022 12:48 am
- Forum: This is SolarChat !!
- Topic: Solar activity 13th jan 2022 - Mg (b2)
- Replies: 9
- Views: 383
Re: Solar activity 13th jan 2022 - Mg (b2)
Thanks to everyone in recognising the image as a "SPOD" -amazing, and humbling..... The Mg triplet and the Na D1/2 doublet are representative of the very low chromosphere, bordering on the top of the photosphere. Based on the professional reviews, this would then infer the images should be...
- Thu Jan 13, 2022 10:18 pm
- Forum: This is SolarChat !!
- Topic: Solar Activity Mg (b2 and b1) 9th Jan 2022
- Replies: 20
- Views: 727
Re: Solar Activity Mg (b2 and b1) 9th Jan 2022
Doug,
I agree, but that assumes the initial image is generated from the absorption line you think you have targeted.
There’s no way with INTI to be 100% sure of the line being used.
With Wah’s SLIM you have the definite option of selecting where the reference is positioned.
I agree, but that assumes the initial image is generated from the absorption line you think you have targeted.
There’s no way with INTI to be 100% sure of the line being used.
With Wah’s SLIM you have the definite option of selecting where the reference is positioned.
- Thu Jan 13, 2022 1:30 am
- Forum: SPoD Archive
- Topic: Solar activity 13th jan 2022 - Mg (b2)
- Replies: 4
- Views: 456
Solar activity 13th jan 2022 - Mg (b2)
Still hampered by strong winds but managed to get a reasonable MiniSHG image in the wavelength of Mg (b2)
All the current active areas and regions of faculae visible - AR 2924/5/6/7/8
plus these a bit of faculae up in the north east....
All the current active areas and regions of faculae visible - AR 2924/5/6/7/8
plus these a bit of faculae up in the north east....
- Thu Jan 13, 2022 1:30 am
- Forum: This is SolarChat !!
- Topic: Solar activity 13th jan 2022 - Mg (b2)
- Replies: 9
- Views: 383
Solar activity 13th jan 2022 - Mg (b2)
Still hampered by strong winds but managed to get a reasonable MiniSHG image in the wavelength of Mg (b2)
All the current active areas and regions of faculae visible - AR 2924/5/6/7/8
plus these a bit of faculae up in the north east....
All the current active areas and regions of faculae visible - AR 2924/5/6/7/8
plus these a bit of faculae up in the north east....
- Wed Jan 12, 2022 8:00 am
- Forum: Solar Radio, Magnetometry and Spectroscopy
- Topic: CaH and continuum SHG images (resolution upgrade)
- Replies: 5
- Views: 957
Re: CaH and continuum SHG images (resolution upgrade)
Doug,
Thanks for reminding us of the data that can be collected from each SER video.
Again one of the strengths of the SHG.
Thanks for reminding us of the data that can be collected from each SER video.
Again one of the strengths of the SHG.
- Tue Jan 11, 2022 11:54 pm
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: Reliable USB3 5 Mtr cable???
- Replies: 17
- Views: 2280
Re: Reliable USB3 5 Mtr cable???
Simon,
I hear you....
All I can say is the CableCreation active 5 mtr cable outlasted all the others I tried and died a year later.
I hear you....
All I can say is the CableCreation active 5 mtr cable outlasted all the others I tried and died a year later.
- Tue Jan 11, 2022 5:27 am
- Forum: This is SolarChat !!
- Topic: Ca II K3 Prominences - 3rd Jan 2022
- Replies: 20
- Views: 751
Re: Ca II K3 Prominences - 3rd Jan 2022
viewtopic.php?f=4&t=34393
Missed this one by Steve!
In the full res CaK image he shows the same proms......
Missed this one by Steve!
In the full res CaK image he shows the same proms......
- Tue Jan 11, 2022 5:11 am
- Forum: This is SolarChat !!
- Topic: Ca II K3 Prominences - 3rd Jan 2022
- Replies: 20
- Views: 751
Re: Ca II K3 Prominences - 3rd Jan 2022
I'd be interested to see any CaK images taken around the same time on the 3rd Jan for comparison......
- Tue Jan 11, 2022 2:47 am
- Forum: This is SolarChat !!
- Topic: Solar Activity Mg (b2 and b1) 9th Jan 2022
- Replies: 20
- Views: 727
Re: Solar Activity Mg (b2 and b1) 9th Jan 2022
Kevin, Depending on your setup it can take between 120 sec and 9 sec. If you just let the solar disk drift across the slit it's 120 sec. If you use the slew buttons on your mount (ie x2 or x3 sidereal) you can get down to 9sec. The other issue is obtaining sufficient frames during the scan video. Th...
- Mon Jan 10, 2022 9:53 pm
- Forum: This is SolarChat !!
- Topic: Ca II K3 Prominences - 3rd Jan 2022
- Replies: 20
- Views: 751
Re: Ca II K3 Prominences - 3rd Jan 2022
Peter, To be honest the current measured performance of the MiniSHG in Ha is around R=35475 (0.18A), this equates to x3 the dispersion of 0.063A/pixel. Finding tight reference lines to verify best possible resolution is problematic - I should try using the Neon lamp.....(I've corrected the original ...
- Mon Jan 10, 2022 8:34 pm
- Forum: This is SolarChat !!
- Topic: Solar Activity Mg (b2 and b1) 9th Jan 2022
- Replies: 20
- Views: 727
Re: Solar Activity Mg (b2 and b1) 9th Jan 2022
Thanks for the positive feedback. The prominent Fe lines either side of the b2 line might pose a problem with the processing software. There doesn’t seem to be a way of positively selecting a target line for subsequent processing, a feature available in Wah’s SLiM. I’ll probably process using both I...
- Sun Jan 09, 2022 10:55 pm
- Forum: This is SolarChat !!
- Topic: Solar Activity Mg (b2 and b1) 9th Jan 2022
- Replies: 20
- Views: 727
Re: Solar Activity Mg (b2 and b1) 9th Jan 2022
Ella,
Good to see you on the forum!
Yes, the Magnesium I Triplet. b2 is the usual target (5172.8A)
Good to see you on the forum!
Yes, the Magnesium I Triplet. b2 is the usual target (5172.8A)
- Sun Jan 09, 2022 4:59 am
- Forum: This is SolarChat !!
- Topic: Solar Activity Mg (b2 and b1) 9th Jan 2022
- Replies: 20
- Views: 727
Solar Activity Mg (b2 and b1) 9th Jan 2022
After four days of complete cloud and rain (28mm in one day!) finally had the opportunity through broken cloud and increasing wind to try the MiniSHG on the Mg lines. Using the Astronomik L1 UV-IR filter, Baader 0.9ND, #56 Green and the 1mm exit slit (approx 70A) I collected a SER video in both the ...
- Sun Jan 09, 2022 12:47 am
- Forum: This is SolarChat !!
- Topic: Sun January 8, 2022 - AR12924 and AR12925 - CaH
- Replies: 10
- Views: 398
Re: Sun January 8, 2022 - AR12924 and AR12925 - CaH
Franco,
Very good results.
The 5A bandwidth still shows some very nice data.
I'm impressed.
Very good results.
The 5A bandwidth still shows some very nice data.
I'm impressed.
- Fri Jan 07, 2022 1:00 am
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: Reliable USB3 5 Mtr cable???
- Replies: 17
- Views: 2280
Re: Reliable USB3 5 Mtr cable???
Checking your list against some of the popular brand names in Australia....
LINDY is missing
Comsol is missing
CableCreation is missing
Alogic and Comsol make the list.
LINDY is missing
Comsol is missing
CableCreation is missing
Alogic and Comsol make the list.
- Thu Jan 06, 2022 11:39 pm
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: TOA for SUN
- Replies: 5
- Views: 1236
Re: TOA for SUN
I use the Genesis 100/ 500 Petzval design for white light imaging with the Baader cool wedge. No issues. I have it in writing from Televue, Takahashi and Williams Optics that all their telescopes (including the multi element Petzval etc.) are 100% safe to use for solar observing without an ERF eg wh...
- Thu Jan 06, 2022 10:06 pm
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: Reliable USB3 5 Mtr cable???
- Replies: 17
- Views: 2280
Re: Reliable USB3 5 Mtr cable???
Simon,
Sorry mate. I don't understand the significance of listing 266 pages of Vendors?????
Sorry mate. I don't understand the significance of listing 266 pages of Vendors?????
- Thu Jan 06, 2022 3:19 am
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: Reliable USB3 5 Mtr cable???
- Replies: 17
- Views: 2280
Re: Reliable USB3 5 Mtr cable???
Simon,
What/ where is the PDF you mention?
What/ where is the PDF you mention?
- Thu Jan 06, 2022 12:36 am
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: Reliable USB3 5 Mtr cable???
- Replies: 17
- Views: 2280
Re: Reliable USB3 5 Mtr cable???
simon et al, Good information but it doesn't qualify a cable as being "fully USB3" capable in real life situations. If you Google - How to test the speed of a USB3 cable? you'll find the "test" very dependent on the hardware being used. All the cables I've tried are quoted to be ...
- Tue Jan 04, 2022 6:00 am
- Forum: This is SolarChat !!
- Topic: Ca II K solar activity 30 Dec 2021
- Replies: 25
- Views: 961
Re: Ca II K solar activity 30 Dec 2021
Good question! In a previous life I’d be more than prepared to give it a go. (That’s how the Spectra-L200 was designed and commercialised) This time round I’ll leave it to others..There’s a manufacturer interested but doesn’t seem to have the drive! The market isn’t big. There’s a few trip hazards w...
- Tue Jan 04, 2022 3:19 am
- Forum: This is SolarChat !!
- Topic: Ca II K solar activity 30 Dec 2021
- Replies: 25
- Views: 961
Re: Ca II K solar activity 30 Dec 2021
Mark, Yes, that would be possible. INTI only takes a few seconds to process an image. I have stacked four images, worked OK. As the position of the image within the frame depends on the scan start and stop position (and also the positioning of the spectrum within the slit gap) registration can be di...
- Mon Jan 03, 2022 9:05 pm
- Forum: This is SolarChat !!
- Topic: Ca II K3 Prominences - 3rd Jan 2022
- Replies: 20
- Views: 751
Re: Ca II K3 Prominences - 3rd Jan 2022
Once again thanks very much for the positive response!
Appreciated.
Appreciated.
- Mon Jan 03, 2022 8:56 pm
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: Lunt CaK filter transmission curve
- Replies: 9
- Views: 1380
Re: Lunt CaK filter transmission curve
Christian,
I don't believe there is an etalon involved in the Lunt CaK filter design.
Just a series of filter elements, as per the Lunt diagram and Bob's earlier comment.
I don't believe there is an etalon involved in the Lunt CaK filter design.
Just a series of filter elements, as per the Lunt diagram and Bob's earlier comment.
- Mon Jan 03, 2022 7:52 pm
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: Lunt CaK filter transmission curve
- Replies: 9
- Views: 1380
Re: Lunt CaK filter transmission curve
Bob,
Thanks for that.
I can understand why they added all the other blocking filters!!
Thanks for that.
I can understand why they added all the other blocking filters!!
- Mon Jan 03, 2022 12:41 pm
- Forum: This is SolarChat !!
- Topic: Ca II K3 Prominences - 3rd Jan 2022
- Replies: 20
- Views: 751
Re: Ca II K3 Prominences - 3rd Jan 2022
Thanks for the positive response!
It's pleasing to see that the results of the MiniSHG are being so well received.
Next challenge will be the Mg (b2) band.....
It's pleasing to see that the results of the MiniSHG are being so well received.
Next challenge will be the Mg (b2) band.....
- Mon Jan 03, 2022 10:23 am
- Forum: This is SolarChat !!
- Topic: Ca II K solar activity 30 Dec 2021
- Replies: 25
- Views: 961
Re: Ca II K solar activity 30 Dec 2021
Mark,
I usually scan the solar disk in 9 sec, at 250 fps.
I usually scan the solar disk in 9 sec, at 250 fps.
- Mon Jan 03, 2022 7:02 am
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: Lunt CaK filter transmission curve
- Replies: 9
- Views: 1380
Re: Lunt CaK filter transmission curve
Bob,
Yes, I've seen those curves before.
But I haven't seen any 380 to 2500 nm transmission curves to confirm all the marketing hype.
I would have thought by now someone would have put a spectrograph on the Lunt CaK filter.......
Yes, I've seen those curves before.
But I haven't seen any 380 to 2500 nm transmission curves to confirm all the marketing hype.
I would have thought by now someone would have put a spectrograph on the Lunt CaK filter.......
- Mon Jan 03, 2022 4:37 am
- Forum: This is SolarChat !!
- Topic: Ca II K3 Prominences - 3rd Jan 2022
- Replies: 20
- Views: 751
Re: Ca II K3 Prominences - 3rd Jan 2022
Thanks guys, appreciate. These were taken in Ca II K3 (central wavelength) resolution about 0.18A. Processed with Matt's version of INTI No additional processing or enhancement - as is, straight out of the ASI 178 ( a bit of colour added in IrfanView). FireCapture V2.7 Gain, 169 Exp 1.7ms fps 140 21...
- Mon Jan 03, 2022 1:56 am
- Forum: This is SolarChat !!
- Topic: Ca II K3 Prominences - 3rd Jan 2022
- Replies: 20
- Views: 751
Ca II K3 Prominences - 3rd Jan 2022
An exciting collection of proms visible this morning - MiniSHG Ca II K.
Enjoy!!
Enjoy!!
- Sat Jan 01, 2022 9:17 pm
- Forum: This is SolarChat !!
- Topic: Ca II K solar activity 30 Dec 2021
- Replies: 25
- Views: 961
Re: Ca II K solar activity 30 Dec 2021
Jame, Definitely one of the strengths of the digital SHG. When you add up all the costs of the various Lunt, Coronado, Daystar filters you would need to cover the more interesting wavelengths it would be a few thousand dollars…….a MiniSHG can be constructed for around $1000, including the camera! Ba...
- Sat Jan 01, 2022 9:06 pm
- Forum: Solar Radio, Magnetometry and Spectroscopy
- Topic: Mg (b2) absorption line
- Replies: 3
- Views: 634
Re: Mg (b2) absorption line
Alexandra, The whole of the solar spectrum can accessed by rotating the diffraction grating. The higher the rotation angle the further into the Red and NIR, so you can have a marked “dial” showing the approximate wavelength after calibration. This is the setup with the Sol’Ex. (https://i.ibb.co/YD8B...
- Sat Jan 01, 2022 3:45 pm
- Forum: This is SolarChat !!
- Topic: Ca II K solar activity 30 Dec 2021
- Replies: 25
- Views: 961
Re: Ca II K solar activity 30 Dec 2021
Thanks Eric.
If I only had the seeing conditions you have I'd use the MiniSHG with a long focus refractor to get some CaK close ups. I'm envious of your results!
If I only had the seeing conditions you have I'd use the MiniSHG with a long focus refractor to get some CaK close ups. I'm envious of your results!
- Sat Jan 01, 2022 3:45 am
- Forum: Solar Radio, Magnetometry and Spectroscopy
- Topic: Mg (b2) absorption line
- Replies: 3
- Views: 634
Mg (b2) absorption line
It was mentioned that the latest Quark is designed to observe the Mg I (b2) absorption line in the solar spectrum. http://daystarfilters.com/Quark/MgIQuark.shtml This line is the middle of the Mg I Triplet at 5172.8A, the b1, b2, b3 etc. comes from Fraunhofer's recording of the more prominent lines ...
- Sat Jan 01, 2022 1:38 am
- Forum: This is SolarChat !!
- Topic: Ca II K solar activity 30 Dec 2021
- Replies: 25
- Views: 961
Re: Ca II K solar activity 30 Dec 2021
James.
Yes , should be an easy target. The Mg I (b2) absorption line is the middle of the Mg triplet, at 5172.8A
I'll image there when I restart the MiniSHG.
Yes , should be an easy target. The Mg I (b2) absorption line is the middle of the Mg triplet, at 5172.8A
I'll image there when I restart the MiniSHG.